Stem-winding and stem-setting watch



April 19, 1927.

W. E. PORTER STEM WINDING AND STEM SETTING WATCH Filed. Nov. 15, 1924 Patented Apr. 19, 1927.

UNITED STATES PATENT QF'FI'CE. I

WILSON E. PORTER, OF NEW HAVEN, CONNECTICUT, ASSIGNOR TO'NEW HAVEN CLOCK CO., OF NEW HAVEN, CONNECTICUT.

STEM-WINDING AND STEM-SETTING WATCH.

Application filed November 15, 1924.

Fig. 1 is a view in front elevation of a stem-winding and stemsetting watch embodying 11y invention, with the parts of its winding-and-setting mechanism shown in their normal or winding positions.

Fig. 2 is a corresponding View, with the parts shown in their occasional or setting positions.

Fig. 3 is a sectional view on the line 3--3 of Fig. 1.

Fig. dis a. sectional view on the line 14 ofFig. 1.

Fig. 5 is a detached, inside face view, on an enlarged scale, of the yoke-unit.

Fig. 6 is an edge view thereof. I

Fig. 7 is a detached view, on the same scale of the yoke-shifter.

Fig. 8 is an edge view thereof.

My invention relates to an improvement in that class of stem-winding and stemsetting watches in which the stem is pulled out for setting, the object being to produce a simple, compact, durable and reliable winding-and-setting mechanism constructed with particular reference to that rigid economy of space demanded in the production of wrist-watches.

With these ends in view, my invention consists in a pull-out-for-setting, stem-winding and stem-setting watch having certain details of construction and combinations of parts as will be hereinafter described and particularly pointed out in the claim.

In carrying out my invention, as herein shown, the front and rear movement-plates 10 and 11 mount a bridge 12 interposed between them and itself mounting a primary windiug-and-setting wheel 13 having a square opening receiving the squared portion 1 1 of a longitudinally-movable and rotatable winding-and-setting stem 15 furnished at its outer end with an ordinary crown 16 and formed at its inner end with a coupling-groove 17 entered and embraced by a pair of coupling-fingers 18 flanking a clearance-cut 19 in a plate-like yoke-shifter 20 mounted upon a hub 21 having pintles 22-22 journalled in the respective front and rear movemenbplates 10 and 11.

The plate-like yoke-shifter 20 is formed with an L-shaped yoke-shifting and yokelocking slot comprising a shifting-edge and a locking-shoulder 25. The said slot 23 receives a pin 26 extending inwardly through a slot 27 in the front movement- Serial No. 750,085.

plate 10 from the right-hand arm of a substantially T-shaped yoke 28 located adjacent to but not bearing upon the front face of the front movement-plate 10 and swinging upon a shouldered stud 29 having a large fiat retaining-head 30 and riveted into the said plate 10.

The shouldered stud 29 mounts an intermediate winding-and-setting wheel 31 constantly in mesh with the primary winding and-setting wheel 13 aforesaid and also constantly in mesh with a secondary windingand-setting wheel 32 mounted upon a stud 33 fixed in the lower end of the yoke and projecting at its inner end intoia limiting slot 34L in the plate 10. The said wheels 31 and 32 are interposed between the yoke and. the front face of the front movement-plate in the very narrow space between the said yoke and plate produced by shoulder-in the stud 29 upon which the wheel 31 turns,

while the wheel 32 which is carried by the yoke upon the stud 33, is oscillated back and forth with the yoke. Thestud 33 pro jects into the limiting-slot 3a in the said front movement-plate but does not extend suiiiciently beyond the inner face thereof to 1 interfere with the c iter wheel of the timemovement.

The left-hand arm at the upper end of the yoke 28 carries a pin 35 extending in ward through a clearance-slot 36 in the plate 10, into position to he engaged by a yokespring 37 carried by the upper left-haud pillar 38 of the movement and looped over a stud 39 in the plate 10. The said spring 37 normally holds the yoke in its winding position. in which the secondary winding and-setting wheel 32 is maintained in mesh with the main winding-wheel 40, as shown in Fig. 1.

iihen the stem 15 is pulled outward for setting the watch, the yoke-shifter 20 is swung from right to left, causing its shifting-edge 24 to press against the pin 26 and rock the yoke 28 from right to left against the tension of the spring '37, whereby the wheel 32 is brought into mesh with the plate-setting wheel ll turning on the stud 42 and constantly in mesh with the dialwheel 4:3, which is constantly in mesh with the center pinion 44:.

As the yoke shifter 20 approaches the limit of its swinging movement from right to left, its locking-shoulder 25 moves over the pin 26 and locks the yoke in its setting position, as shown in Fig. 2. After the conclusion of the setting operation, the stem is pushed inward and the yoke-shifter swung from left to right, whereby the shoulder is disengaged from the pin 26, releasing the yoke 28 to the action of the yoke-spring 37, which immediately swings the yoke back into its normal, or winding, position, its wheel 32 being thus de-meshed from the wheel ll and intermeshed with the wlzeel 40.

Under the construction described, the yoke and yoke-shifter may be moved so close to the center of the watch-movement without collision with the center-wheel of the time-train thereof as to enable the same to be reduced to the standard diameters of wrist-watches without impairment of reli ability of operation or inconvenience of access for attention and repair.

I claim:

In a stem-winding and stem-setting watch of the type in which the stem is pulled out for setting, the combination with the front and back movement-plates thereof, of winding-and-setting trains, a longitudinallymovable and rotatable Winding-and-setting stein, a primary winding-and-setting wheel through which the said stem passes and which is turned in either direction thereby, a pivotal yoke-shifter located between said plates and directly connected with the said stem, a pivotal yoke located adjacent to but not bearing upon the front face of the front movemenhplate and connected with the said yoke-shifter for movement thereby, a shouldered stud upon which the said yoke pivots, an intermediate winding-and-setting wheel interposed between the said yoke and the front face of the front-movement plate and turning upon the said stud, a secondary winding-and-setting wheel also interposed between the said yoke and the front face of the front movement-plate and swung, with the yoke, into engagement with a member of the said setting-train when the windingand-setting stem is pulled outward, and a pin carried by the yoke, mounting the wheel last mentioned.

In testimony whereof, I have signed this specification.

WVILSON E. PORTER. 

